Machinery



UNITED STATES PATENT CFFICE.

ALBERT H. DEAN, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO TIIE WIRE GOODSCOMPANY, OF SAME PLACE.

SWAGING MACHINERY.

SPECIFICATION forming part of Letters Patent No. 555,641, dated March 3,1896. Application 1116.1 May 2,1894. Renewed November 4,1895. Serial No.567,958. (No model.)

To aZZ whom it may concern:

Be it known that I, ALBERT H. DEAN, a citizen of the United States,residing at Worcester, in the county of Worcester and Commonwealth ofMassachusetts, have invented certain new and useful Improvements inSwaging Machinery, of which the following is a specifi cation.

The object of my invention is to provide a machine in which metallicrods may be swaged.

The machine is one in which the rod while being swaged is turned whileit receives a series of blows upon its surface betweenproperly-constructed dies. In this respect it is to be distinguishedfrom that class of swaging machinery in which the stock is not turned,but in which the swaging-dies are placed in a revolving head and acttoward a common center.

In the drawings, Figure 1 is a plan view of the machine. Fig. 2 isafront view, inpartial section, showing the swaging-dies and the mannerin which they are mounted and their relation to the other parts of themachine. Fig. 3 shows the means for connecting the two shafts of themachine, as will be more particularly explained hereinafter. Fig. 4 is atransverse sectional view through the line 4 4, Fig. 1. Fig. 5 is a rearview of the powercarriage, referred to hereinafter; and Fig. 6 is adetail view of the supporting device, referred to hereinafter.

In Fig. 1, Ais the bed of the machine, which may be mounted upon a tableor upon suit able legs, as may be found most convenient. I is a pulleywhich receives power by means of a belt from the main shaft. The belt isshown at 2, Fig. 2.

3, Fig. l, is the main shaft of the machine, mounted in suitablestationary boxes 5 5 5 and carrying the eccentric 6, which actuates theswaging-die 7, mounted in the movable carriage 8,which has areciprocating motion in the ways indicated by solid and dotted lines.

The die-carriage and eccentric are connected by the wrist-pin 9. (Shownin dotted lines, Fig. 1.) A front view of the die and die-carriage isshown in Fig. 2;

It will be noted that the shaft 3 is provided with a thread for part ofits length and that it in detail in Fig. 4.)

passes through the power-carriage l0. (Shown This power-carriage is soconstructed that by means of the lever 11 pressure may be brought tobear upon the nut 13, which is secured to the lever-arm by the screw 12.The thread of the nut conforms to the thread on the main shaft 3, sothat when the lever 11, pivoted at 38, is pushed up the thread in thenut engages with the thread of the shaft, so that when the shaft isrevolved the power-carriage is moved positively upon it.

When it is desired to move the power-carriage rapidly from one end ofthe shaft to the other, which occurs when a rod is taken out of themachine and a new one put in, the power-carriage and the shaft can bedisconnected by depressing the lever 11, thus raising the nut 13 out ofcontact with the thread of shaft 3. The carriage may then be moved toand fro at pleasure, entirely independent of the shaft 3.

The power-carriage is mounted on a way 14,

and is prevented from any lateral movement by the downwardly-projectingsides 15,which embrace the way upon which the carriage moves, as shownin Fig. 4.

The shaft v3 at the end opposite the driving-wheel 1 is provided with adisk 16, upon the circumference of which is the wrist-pin 17, (shownpartly in dotted lines,) upon which the rod 18 is loosely pivoted, whilethe opposite end of the rod 18 is connected in the usual manner withpawl and ratchet-wheel 19 20, whereby motion may be communicated fromthe main shaft 3 to what may be termed the secondary shaft 21. Thesecondary shaft 21 has a bearing at the end toward the ratchetwheel inthe stationary box 22-, and at its opposite end in the box 23, which ismounted upon the movable chuck-carriage 24, which is capable of beingmoved to and fro in the ways 25. The secondary shaft 21 is provided witha chuck 26,which is capable of receiving the metal rod 27 to be swaged.(Shown in dotted lines.) The rod is secured and held in place by meansof the screw 23, which acts upon a common split bushing, as shown. Thesecondary shaft 21 is provided through part of its length with a groove29, while the ratchet-wheel 20 is provided with a key 30, which has aseat in the groove 29, so that the shaft 21 may freely slip through theratchetwheel 20 and at the same time be rotated by it.

In order that the chuck-carriage 24: may not move too freely, it isprovided with a friction device (shown in Fig. 4) consisting of twobolts 31 31, connected by a bridge 32, beneath the center of which aspring 33 has a bearing upon a proper base 54, so that the requiredfriction may be secured upon the ways in which the carriage moves.

In Figs. 1 and 2 is shown a stop 34 attached to the bed of the machine,which may be moved in a line parallel with the main shaft 3 andseeurelyfixed at any desired point, and so placed that when the carriage10 arrives at the desired point the lower end of lever 35 (shown in Fig.5) will strike against the stop 34:. This will throw the hook end 36 ofthe lever 35 out of its normal position, in which it is held by thespring 46, thus releasing the end 37 of lever 11, (shown in Figs. 1 and4,) which is pivoted at 38. The spiral spring 39 is then free to act andpulls down the lever 11, which throws the nut 13 out of contact with thethread on shaft 3. The progress of the power-carriage 10 may thus beautomatically stopped at any desired point.

The carriage 10, which, for the sake of convenience, I have referred toas the powercarriage, is provided with a curved arm 40, which at itsouter end presses against a projecting part 41 of the chuck-carriage 24in such manner that as the power-carriage 10 travels along the shaft 3it carries with it the chuck-carriage 24, the secondary shaft 29, andconsequently the metal rod secured in the chuck and in process of beingswaged.

The movable swaging-die is shown in section in Fig. 2, and it will benoted that its face is hollowed somewhat to conform to the shape of therod to be reduced.

The movable carriage 8 which carries the die is also shown in Fig. 2,together with the ways in which it moves, formed in the bed of themachine.

The die 7 strikes upon a stationary fellow die of similar shape, 43,which is secured. to the bed of the machine by a screw 44.

It is evident that when the die 7 is withdrawn from contact with the rodwhich is being swaged the rod must be held in place; otherwise it woulddrop out of the groove in the die 43 and out of reach of theswaging-die. To effect this I provide a supporting device -15. (Shownindetail in Fig. (3.) I also inclicate its position in Fig. 1.. Thissupporting device is located between the swaging-dies, which it justclears, and the holding-chuck, and consists of an arm secured to aprojection on the bed of the machine by the pin 47, on which it canoscillate. The arm is held in place and against the red by the spring46, which is secured to the bed of the machine by a screw, as shown.

The rod to be swag-ed is placed in the groove across the face of the die43, where it is held by the arm 45, which acts on the opposite side ofthe rod, one end of the rod being secured in the chuck 2G. The rod isthus held firmly in place until the process is completed.

Having described the details of my improved machine, I will proceed todescribe its mode of operation.

The rod 27 is placed in proper position between the swaging-dies, Whereit is held by the supporting-arm a5, and one end is cured in the chuck26. Power is then applied to the driving-wheel 1, and thence imparted tothe main shaft 3, which, through the reciproeating rod 18, imparts arotary motion to the shaft 21. The power-carriage, which at thebeginning of its journey is nearly in contact with the box 5, travels alittle distance before the arm 40 comes in contact with the projectingelbow 41 upon the chuck-carriage 24, the result being that the rod beingtreated is turned upon its axis and evenly swagcd the width of the diearound its entire eircumfer ence before longitudinal motion is impartedto the carriage 24, which then draws the rod 27 slowly along between theswaging-dies, while at the same time the rod has arotary motion, so thatevery part of the circumference of the rod is treated alike and an evensurface is thus produced. The necessity for this arrangement is apparentupon a statement of the fact, for if the chuekcarriage were to movelongitudinally as soon as rotary motion were imparted to the red thefirst end of the rod would receive a rough and uneven finish. Theratchet which turns the secondary shaft 29 is so timed that thesecondary shaft, and consequently the rod which is being swaged, isturned while the movable reducing-die is returning after delivering ablow; but when the blow is delivered the rod remains stationary.

Theoretically the longitudinal movement of the secondary shaft 21 doesnot cease during the swaging operation; but, practically, of course, therod must remain stationary while the blow is being struck, and does so,as there is sufficient spring in the arm i0 and the connections betweenthe main shaft 3 and the secondary shaft 21 to permit of it.

\Vhen the swaging operation is completed the machine may be stopped byuse of an ordinary clutch connection between pulley 1 and shaft 3, or byshipping the belt on the counter-shaft overhead, or in any otherwellknown way, the swaged rod removed, another put in its place, and theoperation repeated.

It will be observed that a metallic rod may be so treated as to have oneor two enlarged heads of any desired length, with the intervening partof the rod swaged to any required size and for any required length.

Having described my invention, what I claim as new, and. desire tosecure by Letters Patent, is-

1. In a swaging-machine the combination of a shaft, threaded for part ofits length, and carrying an eccentric which actuates a swaging-die, witha carriage adapted to engage with said thread, a second shaft adaptedtohold a rod, and intermediate mechanism, whereby rotary and longitudinalmotion may be imparted to said last-named shaft, substantially as shownand described.

2. In a swaging-machine, the combination of a shaft, threaded for partof its length, and carrying an eccentric, which actuates a swaging-die,with a carriage adapted to engage with said thread, a second shaftadapted to hold a rod, and intermediate mechanism

